Abstract
Solidification experiment a graphite mold was carried out on ternary alloy Al-4.61Cu-0.92Si and typical dendrite microstructure was obtained. The influence of heat treatment on microsegregation between the dendrite, and the amount and morphology of the non-equilibrium eutectic phases were studied. Line scans results shows that the dendrite microsegregation disappeared after heat treatment under temperature near the ternary eutectic point. And the amount of eutectic phases is decreased obviously and the morphology of most θ-phase is changed from normal pattern to sphere or nearly spherical.
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